Inspection Procedure

HINT:

Using Techstream to perform Active Test allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Test early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Test.

1. PERFORM ACTIVE TEST 
   1. Warm up the engine.
   2. Turn the ignition switch off.
   3. Connect Techstream to the DLC3.
   4. Turn the ignition switch to the on position.
   5. Turn on the tester.
   6. Select the item "Powertrain/Engine and ECT/Active Test/Shift Status".
   7. According to the display on the tester, perform the "Active Test".

      HINT:

      While driving, the shift position can be forcibly changed with Techstream.

      Comparing the shift position commanded by the Active Test with the actual shift position enables you to confirm the problem (See FAIL-SAFE CHART ).

      FAIL-SAFE CHART
      
      

      Tester Display	Test Part	Control Range	Diagnostic Note
      Control the Shift Position	[Test Details] Operate the shift solenoid valve and set each shift position by yourself. [Vehicle Condition] IDL: ON Less than 50 km/h (31 mph) [Others] Press "→" button: Shift up Press "←" button: Shift down	1st/2nd/3rd/4th/5th	Possible to check the operation of the shift solenoid valves.

      HINT:

      • This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
      • The shift position commanded by the ECM is shown in the Data List/Shift Status display on Techstream.

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0771) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to the on position and turn the Techstream main switch ON.
   3. When you use Techstream:

      Select the item "Powertrain/Engine and ECT/Trouble Codes".

   4. Read the DTCs using Techstream.

      Result 

      RESULT CHART
      
      

      Display (DTC output)	Proceed to
      Only "P0771" Is output	A
      "P0771" and other DTCs	B

      HINT:

      If any other codes besides "P0771" are output, perform the troubleshooting for those DTCs first.

      B: GO TO DTC CHART  (See DIAGNOSTIC TROUBLE CODE CHART )

      A: Go to next step 

2. INSPECT SHIFT SOLENOID VALVE SR 
   1. Remove the shift solenoid valve SR.
   2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      RESISTANCE SPECIFICATION
      
      

      Tester Connection	Condition	Specified Condition
      Solenoid Connector (SR) - Solenoid Body (SR)	20°C (68°F)	11 to 15 Ω

   3. Connect positive (+) lead to the terminal of solenoid connector, negative (-) lead to the solenoid body.

      OK: The solenoid makes an operating sound. 

      NG: REPLACE SHIFT SOLENOID VALVE SR  (See DISASSEMBLY )

      Fig 1: Inspecting Shift Solenoid Valve SR

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to next step 

3. INSPECT TRANSMISSION VALVE BODY ASSEMBLY 

   OK: There are no foreign objects on each valve and they operate smoothly. 

   NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY  (See REMOVAL )

   OK: Go to next step 

4. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY 

   OK: The torque converter clutch operates normally. 

   NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY 

   OK: REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY  (See REMOVAL )